Liberally clothing the uplands around the Preserve is a warm-desert shrub mixture, mainly Joshua tree, datil yucca, creosote bush, black bush, and cholla cactus. Lowlands along the creek support velvet ash, fremont cottonwood, black willow, and desert willow. Catclaw acacia grows on the stream terraces and up the drainages into the dry lands. Fruit of the California mistletoe, a parasite of the catclaw, is eaten by several birds, especially the phainopepla, which transfers the sticky seeds from one plant to another. Desert birds usually associated with arid regions south of Utah which nest on the preserve are the white-winged dove, Costa's hummingbird, brown crested flycatcher, Bell's vireo, verdin, black-tailed gnatcatcher, phainopepla, Lucy's warbler, summer tanager, and hooded oriole. Roadrunners nest and thrive on the property by eating reptiles of all kinds including poisonous ones. Desert tortoises on the property are native and survive the summer heat and winter cold in protective dens. Coyotes stalk cottontail, California jackrabbit; and even mule deer. The Virgin River spinedace, a small, rare desert minnow, is a year-round resident in the stream, and is under review for federal protection. The Gila monster, a beautiful poisonous lizard with bead-like scales, is a rarely seen resident of the preserve.
- Beaver Dam Wash Lichens Checklist